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All fiber optical inter-band router for broadband wavelength division multiplexing

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Abstract

We propose a new type of all-fiber device for inter-band router using a novel hybrid waveguide-MEMS technology. Both continuous and discrete band-routing functions are realized by precise twist control over the fused coupling region, which results in π phase shift between the output ports. Experimentally we demonstrate inter-band routing functions between O and C-band as well as between E and L-band with a low insertion loss, wide bandwidth of operation, high channel isolation and fast response.

©2004 Optical Society of America

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Figures (7)

Fig. 1.
Fig. 1. Principle of the proposed inter-band router based on a tunable 2×2 coupler.
Fig. 2.
Fig. 2. (a) Refractive index change along the applied axial stress. (b) Coupling characteristic change due to the width variation of coupling region of coupler.
Fig. 3.
Fig. 3. Transmission characteristic of O/C-band router : (a) Shift of transmission spectra under torsion stress, (b) Transmission spectra of output port before and after routing.
Fig. 4.
Fig. 4. Variation of the center wavelength and the maximum channel isolation as a function of the rotation angle.
Fig. 5.
Fig. 5. Transmission characteristic of O/C-band router : (a) Shift of transmission spectra under torsion stress, (b) Transmission spectra of output port before and after routing.
Fig. 6.
Fig. 6. Variation of the center wavelength and the maximum channel isolation as a function of the rotation angle.
Fig. 7.
Fig. 7. Band routing performance in 1550nm 10Gb signal:(a)Bit error rate measurement setup, (b)Eye diagram, (c)BER vs Reciever power.

Equations (2)

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C ( z ) = δ U 2 ( z ) K 0 ( W ) b V 3 K 1 2 ( W )
Δ n r = C b σ z = C b τ A ρ 0 r ρ 3 d ρ
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